Added test structure

MewtocolTests/MewtocolTests.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net6.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+
+    <IsPackable>false</IsPackable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.3.2" />
+    <PackageReference Include="xunit" Version="2.4.2" />
+    <PackageReference Include="xunit.runner.visualstudio" Version="2.4.5">
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+      <PrivateAssets>all</PrivateAssets>
+    </PackageReference>
+    <PackageReference Include="coverlet.collector" Version="3.1.2">
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+      <PrivateAssets>all</PrivateAssets>
+    </PackageReference>
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\MewtocolNet\MewtocolNet.csproj" />
+  </ItemGroup>
+
+</Project>

MewtocolTests/TestComProtocol.cs

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+using Xunit;
+
+using MewtocolNet;
+using MewtocolNet.Registers;
+using System.Diagnostics;
+using Xunit.Abstractions;
+using System.Collections;
+
+namespace MewtocolTests {
+
+    public class TestComProtocol {
+
+        private readonly ITestOutputHelper output;
+
+        public TestComProtocol (ITestOutputHelper output) {
+            this.output = output;
+        }
+
+        [Fact(DisplayName = "Numeric register protocol identifiers")]
+        public void NumericRegisterMewtocolIdentifiers () {
+
+            List<Register> registers = new List<Register> {
+                new NRegister<short>(50),
+                new NRegister<ushort>(50),
+                new NRegister<int>(50),
+                new NRegister<uint>(50),
+                new NRegister<float>(50),
+                new NRegister<BitArray>(50),
+            };
+
+            List<string> expcectedIdents = new List<string> {
+                "D0005000050", //single word register
+                "D0005000050", //single word register
+                "D0005000051", //double word register
+                "D0005000051", //double word register
+                "D0005000051", //double word register
+                "D0005000051", //double word register
+                "D0005000051", //double word register
+            };
+
+            //test mewtocol idents
+            for (int i = 0; i < registers.Count; i++) {
+
+                Register? reg = registers[i];
+                string expect = expcectedIdents[i];
+
+                Assert.Equal(expect, reg.BuildMewtocolIdent());
+
+            }
+
+        }
+
+    }
+
+}